Electric switch.



J. KEEPE.

I ELECTRIC SWITCH. APPLICATION FILED MAY 6, 1909.

967,932. Patented u .23,1910

Mid-finesse a.

UNITED srarnsrarnnr cemen- JOSEPH KEEFE, 015 BOSTON, MASSACHUSETTS, ASSIGNOR T CHARLES S. KNOWLES, OE NEW BEDFORD. MASSACHUSETTS.

ELECTRIC SWITCH.

Specification of Letters Patent. Patented Allgrgii, 1910.

.Applieation filed May 6. 1909. Serial No. 494,445.

- prove the construction and operation of eleclever.

tric switches, and one feature of my inven- 'tion consists in means for limiting the movement of the switch controlling means.

Another feature of my invention is themeans for positioning the push buttons;

Another feature is a removable operating spring. g

In the drawings Figure 1 is an elevation of a switch embodying my invention; Fig. 2 is a bottom plan; Fig. 3 is a central, vertical section; and Fig. 4t is a detail hereinafter described. I

ithin casing A. which is of insulating material, are, the binding posts c a and contact terminals c (1 suitably held in place. Supporting plate B and cover A. may lie held to the casing by screws or other attaching means, and are apertured as usual. Suspended from plate B is hearing yoke D which. carries pin (Z forming the pivot of the rock arm. This rock arm comprises two parallel members E and E which are connected at their ends and pivoted in slots 7, 5 termed in members G, G which members have wings g, g to cooperate with the under side of plate B for purposes to be hereinafter explained. Upon members G, G are rigidly mounted the push buttons H and H.

Near the bottom of each of the members E and E is a hole 0 from which leads a short passage 6. Pivoted in the holes 0, e is abutment K -which is preforated and which has projections is, is, the projections normally oscillating in the holes (2, 0 but capable of being slid outthrough the small passages c if it is desired to remove the spring in the manner hereinafter described. Pivoted at L to yoke D is a. tilting lever comprising parallel plates Z and Z connected by pin Z and having shoulders 7, Z to engage pin (Z to limit the movement of the Pin M has an enlarged head at, the latter being notched to engage pin Z. Upon the body of this pin is coiled spring N, the

head of the pin serving as an abutment for one end of the spring and abutment K being opposed to the other end of the spring, the

g of said member.

small end of the pin passing through the perforation in abutment K. It will be clear that the spring can be readily removed and replaced either by forcing abutment K downward and drawing its projections out through passages a, and then slipping the abutment ed the pin M, or by forcing the head of the pin M oli the pin Z and then withdrawing the bolt from abutment K. This construction not only makes-the switch very easily sombled but. also provides for quick repairing or rcplacingof worn parts. ll'lounted to oscillate with the tilting lever is hub P carrying terminals f, 7" which make and break with terminals (1. and a In using my switch, assuming the parts to be in the positions shown, the button H is pushed down and as it descends thd pivot at the end of the rock arm moves outwardly in'slot 9 until said end is opposite the pivot of the rock arm and from that time on said end part moves inwardly in said slot, the result being that ,the push button occupies a position at right angles to plate B during lt'S reciprocation. Pressing down the button stores power in the spring and oscillates it by carrying the upper abutment of the spring toward a. line extending from the pivot L of the lever to the pin Z of the lever. l/Vhen the upper abutment passes that line the stored power in the spring operates to. tilt the lever, shift the contact terminals and raise button H to its highest position, it being obvious that the slot 9 in member G provides for the reciprocation of button H 1n a similar manner. If button H as it approaches the highest position tends to be tilted to the left it will be forced into a vertical position by outer wing g of'member G and if it tends to tilt to the right it will be similarly acted upon by inner wing These two Wings are forced against plate B through the agency of the spring and rock arm and therefore act to limit the movement of the rock arm. and button.

The advantages of my switch will be clear from the above description, especially the efiiciency of operation and the improvements in construction.

that I claim is:

1. An electric switch comprising a pivoted lever; a spring to operate said lever; a rock arm for actuating the spring; an apertured supporting member; and push buttons I mounted to recinroc ate through said mexnwhen thepush buttons afe in their outer most POSltIOII. P 2', An electric switch comprislng a pivoted arm formctuating the spring; an apertured supporting member; and push buttons mounted toareciproc'ate through said mem-. her and each having a sliding connection with the rock arm and each having oppositel y disposed projections to engage said 16 member to position said push buttons at .right angles with said member when the push buttons are in their outermost osition.

' JOSEPH FE.

ber and each having a sliding connection with the rock-arm and each havin means to engage said'member t -position said push buttons atright angles with saidmember Witnesses:

' ARTHUR F. RANDALL, M. G. HnNNnssY.

leverg a spring to operate said lever; a rock- 

